#split-view {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-primary);
}

/* Toolbar */
.split-view-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
    height: 48px;
}

.split-view-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 400px;
}

.split-view-mode-badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
    border-radius: 100px;
    background: var(--color-accent-muted);
    color: var(--color-accent);
    border: 1px solid var(--color-accent-muted);
    white-space: nowrap;
}

#split-view[data-mode="terminal"] .split-view-mode-badge {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
    border-color: rgba(34, 197, 94, 0.25);
}

.split-view-creds {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.split-cred {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
}
.split-cred-label {
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.6rem;
    letter-spacing: 0.05em;
}
.split-cred-value {
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    user-select: all;
}
.split-cred-password { color: var(--color-accent); }

.split-view-actions { display: flex; gap: 0.25rem; }

/* Panels */
.split-view-panels {
    display: flex;
    flex: 1;
    overflow: hidden;
}
.split-panel {
    overflow: hidden;
    position: relative;
}
.split-panel-lecture {
    flex: 0 0 40%;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-primary);
}
.split-panel-desktop {
    flex: 1;
    background:
        radial-gradient(ellipse 60% 50% at 50% 40%, rgba(16, 185, 129, 0.08), transparent 70%),
        radial-gradient(ellipse 40% 40% at 50% 70%, rgba(59, 130, 246, 0.06), transparent 70%),
        linear-gradient(180deg, #0a0f1a 0%, #050810 100%);
}

/* Drag handle */
.split-view-handle {
    flex-shrink: 0;
    width: 6px;
    cursor: col-resize;
    background: var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
    position: relative;
    z-index: 10;
}
.split-view-handle:hover,
.split-view-handle.dragging { background: var(--color-accent); }

.split-handle-grip {
    width: 2px;
    height: 32px;
    border-radius: 1px;
    background: rgba(255, 255, 255, 0.3);
}
.split-view-handle:hover .split-handle-grip,
.split-view-handle.dragging .split-handle-grip { background: rgba(255, 255, 255, 0.6); }

/* Iframe */
.split-desktop-iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
    opacity: 0;
    transition: opacity 0.28s ease;
    pointer-events: none;
}
.split-desktop-iframe.loaded {
    opacity: 1;
    pointer-events: auto;
}

/* Loading view:
   Shared orb glow / dot stages / shimmer bar live in base.css; this section
   only owns the layout and the (non-shared) hero text + size of the inner orb. */
.split-desktop-loading {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    gap: 1rem;
    padding: 2rem;
    text-align: center;
    background:
        radial-gradient(ellipse 60% 50% at 50% 40%, rgba(16, 185, 129, 0.08), transparent 70%),
        radial-gradient(ellipse 40% 40% at 50% 70%, rgba(59, 130, 246, 0.06), transparent 70%),
        linear-gradient(180deg, #0a0f1a 0%, #050810 100%);
    overflow: hidden;
    transition: opacity 0.28s ease;
}
.split-desktop-loading::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.025) 1px, transparent 0);
    background-size: 32px 32px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
    pointer-events: none;
}
.split-desktop-loading[style*="display: none"] { opacity: 0; }
.split-desktop-loading > * { position: relative; z-index: 1; }

.split-loading-icon {
    width: 104px;
    height: 104px;
    margin-bottom: 0.5rem;
}
.split-loading-icon svg { animation: splitPulse 2.4s ease-in-out infinite; }
@keyframes splitPulse {
    0%, 100% { transform: scale(1);    opacity: 0.9; }
    50%      { transform: scale(1.08); opacity: 1; }
}

.split-desktop-loading h3 {
    font-size: 1.3rem;
    color: var(--color-text-primary);
    font-weight: 700;
    letter-spacing: -0.01em;
    background: linear-gradient(135deg, #f9fafb 0%, #9ca3af 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.split-desktop-loading p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    max-width: 420px;
    line-height: 1.55;
}

.split-loading-progress { width: 260px; margin-top: 0.85rem; }
.split-loading-stages {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-top: 1.25rem;
    min-width: 260px;
    text-align: left;
}

.split-allocate-btn {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
}

#split-view.swapped .split-view-panels { flex-direction: row-reverse; }
#split-view.resizing                   { user-select: none; }
#split-view.resizing iframe            { pointer-events: none; }

/* Responsive */
@media (max-width: 900px) {
    .split-view-panels  { flex-direction: column; }
    .split-panel-lecture { flex: 0 0 45%; }
    .split-view-handle  { width: auto; height: 6px; cursor: row-resize; }
    .split-handle-grip  { width: 32px; height: 2px; }
    #split-view.swapped .split-view-panels { flex-direction: column-reverse; }
    .split-view-title    { display: none; }
    .split-cred-label    { display: none; }
}